<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<link rel="stylesheet" href="./test.css"
<body>
  <div class="headerStyle">
    <h1 style="text-align: center;" id="test">测试代码</h1>
  </div>
  <script src="./test.js"></script>
</body>
</html>